baber/WOPTO huggingface dataset:
Patent GB-935390-A (GB)
Title: Improvements in or relating to the manufacture of corundum crystals
Inventor: WHITE ERIC ALFRED DUTTON
IPC: C30B9/00
Filed: 1960-12-20
Abstract: Corundum crystals are made by forming a mixture of alumina and a molten flux, the proportion of flux being sufficient to dissolve all the alumina but being such that the resulting solution is supersaturated at a temperature above the melting point of the flux, heating the mixture at a temperature above the said temperature at which supersaturation occurs until a homogeneous solution is obtained, cooling the solution to room temperature, and separating, e.g. by washing or chemically dissolving the flux, the alumina crystals so formed.  The flux is a material with a melting-point below that of alumina and in which alumina dissolves without chemical action taking place.  Suitable flux materials are alkali metal halides, lead and boric oxides, lead chloride and, preferably lead fluoride.  A minor proportion of an additive may be incorporated into the mixture, e.g. a compound yielding paramagnetic or colouring ions when the mixture of alumina and flux is heated.  The starting mixture may be formed by adding solid alumina to molten flux or a solid mixture of alumina and flux may be heated to the melting-point of the flux. The proportion of flux is dependent upon the nature of the flux material and the maximum temperature to be attained, e.g. if lead fluoride is used as flux and the temperature is 1250 DEG C., the starting mixture contains at least 85 mol. per cent of lead fluoride. The mixture is placed in a non-reactive vessel, e.g. platinum, preferably sealed and evacuated, and is conveniently heated by means of an electric furnace.  Heating is continued for several hours, e.g. at 1150 DEG  to 1300 DEG C., using lead fluoride as flux.  The melt is then cooled very slowly, e.g. 1 DEG  to 2 DEG C. per hour until the flux solidifies and thereafter may be cooled more rapidly. Hexagonal plates of corundum are formed.  In a modification, seed crystals of corundum, e.g. crystals cut from boules grown by flame fusion, are placed on top of the mixture of alumina and flux, oriented with their major surfaces parallel to the surface of the mixture. In an example, a mixture of gamma alumina powder, lead fluoride powder and ammonium dichromate powder is heated at 1280 DEG C. for 10 hours, cooled to 990 DEG C. at the rate of 15 DEG C. per hour, and then allowed to cool to room temperature.  The lead fluoride was then removed by boiling the mass in hydrochloric acid, leaving hexagonal plates 3-4 cms. x 1 cm. of "ruby" corundum.
Patent GB-1130165-A (GB)
Title: Inhibition of oxidative deterioration using hydroxylated n-alkylamines
IPC: C11D10/04
Filed: 1965-10-15
Abstract: 1,130,165. Hydroxy amines. STERLING DRUG Inc. 15 Oct., 1965 [19 Oct., 1964], No. 43882/65. Heading C2C. [Also in Divisions B1 and C5] Hydroxy amines of the formula wherein R represents hydrogen or C 1-10  alkyl, R<SP>1</SP> represents C 10-18  alkyl and R<SP>11</SP> and R<SP>111</SP> each represent methyl, ethyl or hydroxymethyl, the sum of the carbon atoms present in the amine being from 14 to 28 inclusive, are prepared by alkylation of compounds in which R<SP>1</SP> represents hydrogen with an appropriate R<SP>1</SP> halide or analogous alkylating agent. Alternatively, compounds in which R represents a methyl group may be obtained by reacting compounds in which R represents a hydrogen atom with paraformaldehyde in benzene under reflux to produce a 3 - R<SP>1</SP> - 4,4 - dimethyloxazolidine intermediate which is subsequently converted to the required product by hydrogenation. The hydroxy amines of the above formula may also be converted into acid addition salts, e.g. with hydrochloric or lauric acids.
Patent GB-1155425-A (GB)
Title: Control Equipment for Lifting Apparatus such as Elevators, Freight Lifts, Funiculars or Cable Cars
Inventor: VIZZOTTO RAFFAELLO
IPC: B66B1/28
Filed: 1966-09-30
Abstract: 1,155,425. Cooling brake drums. R. VIZZOTTO. 30 Sept., 1966 [2 Oct., 1965; 24 May, 1966; 12 Sept., 1966], No. 43892/66. Heading F2E. [Also in Divisions G3 and H2] A brake pulley comprises two solid annular bodies 102, 103, the first having a braking surface 102a and the second forming a mass adapted to receive heat developed in the first body and to dissipate it. The bodies 102, 103 are coupled by spokes 114 associated with cooling-channels 105 for centrifugal air-flow. The channels have an axial inlet 106 and a radial outlet 107 consisting of slits on the outer surface of the body 103, the section of the channels decreasing from the inlet to the outlet. A double-drum arrangement is shown having fixing bolts 118, but a single unit may be formed by casting. The double drum may form the coupling between a lifting motor and a winch. The brake shoe is operated by an electromagnet having a compression spring, the coil of the electro-magnet being associated with a control system for an A.C. motor.
Patent GB-1013434-A (GB)
Title: Improvements in or relating to bistable electrical circuits
Inventor: BURTON ANTHONY JOHN
IPC: H03L1/02
Filed: 1961-12-08
Abstract: 1,013,434. Transistor bi - stable circuits. RACAL COMMUNICATIONS Ltd. March 8, 1963 [Dec. 8, 1961], No. 43957/61. Heading H3T. The condition of a bi-stable circuit comprising two alternatively conducting transistors is controlled from a common input line through respective gates and a reference signal dependent upon the voltages at the transistors is applied to the gates. The two cross-coupled transistors VT2, VT3 of the bi-stable circuit shown are controlled through respective gating transistors VT1, VT4 by input pulses applied at A, the gates transistors having their collectors connected to the opposite one of the transistors VT2, VT3 to determine which one passes the input pulse. The emitters of the gating transistors are connected to a reference potential derived through an emitter follower VT5 from the common emitter resistor R5 and this permits the use of smaller energizing pulses as compared with the prior circuit in which the emitters are connected to earth. Higher triggering speeds may be obtained if R10 and C4 are omitted and a multi-stage amplifier replaces VT5 (cf. Figure, not shown).
Patent GB-914425-A (GB)
Title: Process for the production of pure cyclohexanone
Inventor: POEHLER GUENTER
Filed: 1960-12-23
Abstract: Cyclohexanone is obtained from crude cyclohexanol by evaporating the bulk of the latter in a first vaporization zone at 140-180 DEG C., supplying the liquid residue to a second vaporization zone wherein it is vaporized as far as possible by a suitably correlated adjustment of temperature and pressure, returning the vapours from the second to the first zone (alternatively having condensed the vapours to liquid and returning this to the first zone), the vapours preheated to 250-400 DEG C. being then passed over a dehydrogenation catalyst at a velocity of 50-100 cm./sec., the residence period at the catalyst being 4-12 seconds.  The catalyst is a heavy metal of Group Ib, IIb, VIa or VIII or an oxide or carbonate or mixtures thereof; copper supported on pumice or ferric oxide is specified.
Patent GB-964631-A (GB)
Title: Electrode for electrolytic processes
IPC: C23F13/02
Filed: 1962-11-22
Abstract: An electrode for electrolysis of brine and similar processes comprises an inert base metal e.g. Zr, Ta or Ti, coated with a platinum group metal which also contains 0.1-0.7% by weight of carbon.  The metal coating is formed by using a solution of a salt of platinum, rhodium, ruthenium, iridium, or a mixture thereof, in an organic chelate which may be deposited electrolytically, and then heated to decompose the chelate at 170-400  DEG C. forming carbon. The coating is improved by a second stage heating up to 700  DEG C., to diffuse the carbon coating in the metal substrate. Chelate compounds specified include acetyl acetone, aceto-acetic ester, malonic ester, cyanacetic ester, and malonic acid nitrile. The platinum metal-chelate coating may be applied by spraying, vapour-coating or by heating the solution in contact with the metal surface.
Patent GB-1160070-A (GB)
Title: Improvements in Arc Welding Electrodes
Inventor: PHELPS BRIAN
IPC: B23K35/36
Filed: 1967-04-10
Abstract: 1,160,070. Welding by fusion. MUREX WELDING PROCESSES Ltd. 29 Sept., 1967 [10 April, 1967], No. 44487/67. Divided out of 1,160,069. Heading B3R. [Also in Division C7] A tubular arc welding electrode capable of use without external shielding to produce a hard facing weld deposit containing at least 0À25% aluminium consists of a mild steel sheath enclosing a core constituting 21-45% by weight of the electrode and of the following composition:- 5-25% rutile 9-20% fluoride 2-9% carbonate 0-5% potassium titanate 3-11% aluminium 0-12% nickel 35-62% manganese 1À2-1À4% carbon balance iron powder. The fluoride consists of calcium fluoride and/or cryolite up to 1/3 of which may be replaced by sodium or aluminium fluoride. The carbonate is calcium, barium, strontium or magnesium carbonate and potassium carbonate may be present in an amount equal to 2% of the total carbonate. Aluminium is present as a powder or wire. Manganese is present as metal or ferroalloy. The carbon content as specified is inclusive of carbon in ferro-alloys.
Patent GB-1088828-A (GB)
Title: A method of determining continuously the concentration of an active component in a mixture of inert liquids or gases
IPC: G01N27/44
Filed: 1965-10-22
Abstract: 1,088,828. Determining the quantity of a constituent in a fluid. J. DERKA AND O. ZAHEJSKY. Oct.22, 1965 [Oct. 23, 1964], No.44736/65. Heading G1A. The quantity of a constituent in a fluid e. g. sulphur dioxide in air is continously determined by reacting the constituent with a reagent e. g. iodine and determining the quantity of reagent used. The reagent is produced electrolytically and the current measured. The light transmissivity of the contents of the reaction vessel being maintained constant by a photo-electric monitoring arrangement which controls the current in the reagent generating circuit.
Patent GB-1246092-A (GB)
Title: Improvements relating to thermographic recording
Inventor: LAMBRECHTS JAN BERNARD
IPC: B41M5/36
Filed: 1967-10-02
Abstract: 1,246,092. Thermographic transfer processes. AGFA GEVAERT. Sept.10, 1968 [Oct.2, 1967], No.44794/67. Heading G2C. A thermographic transfer process wherein a heat-sensitive material comprising a support bearing a water-permeable layer which contains hydrophobic thermoplastic particles dispersed in a hydrophilic binder is imagewise heated rendering the heated areas less water permeable or water impermeable, developed to remove the unheated water-permeable areas and then pressed partly or entirely into contact with a receptor sheet to transfer some or all of the heated areas. Preferred heat-sensitive materials are those of Specifications 1,139,891 and 1,160,221. To assist the transfer, the support may be coated with a subbing layer as in Specification 1,177,481 before applying the heat-sensitive layer. In the Examples, a polyester support is coated with a subbing layer of polyethylene particles and silica dispersed in a vinylidene chloride copolymer or polyethylacrylate and is overcoated with a heatsensitive layer of polyethylene particles and carbon black alone or dispersed in polyvinylpyrrolidone is imagewise exposed to a flash lamp and the unheated areas are washed off. The material is contacted with a receptor sheet and the back of the material rubbed to transfer the heated areas of the heat-sensitive layer to the receptor sheet. The heat-sensitive layer may be overcoated with a layer of butyl acrylate/vinyl acetate copolymer or polyisobutyl methacrylate to assist transfer to the receptor sheet. The heat-sensitive layer may contain a water-insoluble pigment and thus give a coloured image on transfer. If three heat-sensitive layers containing yellow, cyan and magenta pigments are imagewise exposed to the appropriate colour separation negatives and transferred in register to the receptor sheet, a colour proof is obtained.
Patent GB-1360653-A (GB)
Title: Image-receiving elements for use in photographic silver salt dif fusion-transfer processes
IPC: G03C8/28
Filed: 1971-09-27
Abstract: 1360653 Photographic material FUJI PHOTO FILM CO Ltd 27 Sept 1971 [28 Sept 1970] 44997/71 Heading G2C  An image-receiving element for the photographic silver salt diffusion transfer process comprises a support coated with (a) a receiving layer comprising colloidal silicon dioxide and dispersed silver precipitating nuclei, over-coated with (b) a layer comprising at least one condensate of HCHO and hydantoin which may be mono- or di-substituted by methyl and/ or ethyl on the 4- carbon atom, the adduct containing 1-10 units of the hydantoin.
Patent GB-1003721-A (GB)
Title: Improvements in reciprocating compressors, pumps or motors
IPC: F16H23/08
Filed: 1963-11-14
Abstract: 1,003,721. Reciprocating pumps and motors; I.C. engine driving gear; compressors. SULZER BROS. Ltd. Nov. 14, 1963 [Nov. 28, 1962], No. 45079/63. Headings F1A, F1B and F1N. [Also in Division F2] In a reciprocating motor, pump, or compressor, having a number of opposed pistons 3 coupled to a crank-shaft 13 by a pair of annular wobblers 8 at opposite ends of the cylinders 2, each wobbler is mounted in a casing 1 by a cardan suspension, and has a frusto-conical extension 11 extending away from the pistons and journalled at a bearing 12 on an inclined crank-pin of the crank-shaft 13, a collar 30 preventing axial movement of the wobbler. The outer surface of each bearing 12, and the corresponding surface of the wobbler 8, may be part spherical to compensate for errors in the cardan suspension. The cardan or gimbal mounting of each wobbler comprises pins 20, a ring 23, and pins 25, the ring 23 having split bearings 22 to receive the large diameter ends 21 of the pins 20. The crank-shaft 13 is formed in two parts which have co-operating teeth 14 on the mating surfaces and are held together by a tie-rod 15. Two bearings 16 in end covers 17 of the casing provide the only support of the crank-shaft, which is provided with balance weights 26. The pistons 3 have piston rods 4 whose ball ends 5 bear against bearing shells 6 retained in bores 7 of the wobbler 8 by screws 10.
Patent GB-1365871-A (GB)
Title: Metal air batteries
IPC: H01M12/06
Filed: 1971-09-03
Abstract: 1365871 Metal air cells JOSEPH LUCAS (INDUSTRIES) LTD 3 Sept 1971 [23 Sept 1970] 45211/70 Heading H1B A metal-air battery in which each individual cell consists of a metal plate, constituting the anode, disposed between a pair of air electrodes is made by providing a synthetic resin strip 31 with a series of rectangular openings 32 and sealing over each of the openings air electrodes such as 18, 19 having terminal tags 18a, 19a. Hinges are formed at intervals along the strip 31 by reducing the thickness of the strip along transverse lines to form portions 33, 34 and permit the strip to be folded and form individual cell electrolyte compartments 21, 22, 23. Thus, cell 21 has air electrodes 12, 13, cell 22 has air electrodes 15, 16 and cell 23 has air electrodes 18, 19, an anode plate (not shown) being positioned between each pair of air electrodes. Air enters the end spaces 24 and intermediate spaces 26, 27 and the ends of the cell compartments are closed by plates 38. The cells are connected in series by connections (not shown) made to the tags 12a &c. and to the metal anode plates.
Patent GB-1522539-A (GB)
Title: Process for dyeing textile sheet-like structures
IPC: D06P5/20
Filed: 1976-11-01
Abstract: 1522539 Dyeing textile sheets to different depths of colour BAYER AG 1 Nov 1976 [3 Nov 1975] 45283/76 Heading D1B The front and back of a textile sheet material are dyed to different depths of colour by padding the material with a dye liquor followed by feeding in close contact with one or more auxiliary structures which are in sheet form and act as a heat shield, to a drying unit and then fixing the dye on the material. The auxiliary sheet structure may be paper or damp undyed textile material which is introduced before drying between two webs formed by doubling the textile sheet structure. After dyeing the material may be cross dyed with a different coloured dye. During drying the dye liquors migrate giving rise to different depths of shade in the material when fixation is effected.
Patent GB-1019268-A (GB)
Title: Improvements in and relating to air separation plants
IPC: F25J1/02
Filed: 1964-11-09
Abstract: 1,019,268. Cold separation of air. SULZER BROS. Ltd. Nov. 9, 1964 [Nov. 8, 1963], No. 45625/64. Heading F4P. An air rectification plant is continuously operated to meet a fluctuating demand for gaseous oxygen discharged from the plant through ducts 1, 3, 23 (Fig. 1, not shown) by condensing excess oxygen during low demand periods in a coil 19 immersed in a tank 9 charged with either separated liquid nitrogen or with liquid air, storing the liquid oxygen in a tank 10 and revaporizing it during a high demand period by passing nitrogen through a coil 20 after having been compressed at 11, cooled at 12, 13 and expanded in a turbine 15; the condensed nitrogen leaving coil 20 being expanded at a value 18 and fed to the tank 9 whilst oxygen vapour traverses a duct 4 leading to the consumer line 3. Coil 19 is maintained full of liquid oxygen by closure of a valve 21 controlled by a member 22 responsive to pressure in the gas space of tank 10.
Patent GB-1120627-A (GB)
Title: Improvements relating to electric circuits
Inventor: SIMS GEORGE EDWARD
IPC: G05B11/26
Filed: 1964-11-11
Abstract: 1,120,627. Aircraft control hybrid multiplier. ELLIOTT BROS. (LONDON) Ltd. 10 Nov., 1965 [11 Nov., 1964], No. 45992/64. Headings G4G and G4H. An amplifier arrangement includes an input circuit comprising a plurality of parallel connected binary weighted resistors 12a, 12b, 12c, 12d, each resistor being connected in series with a switching means 13a, 13b, 13c, 13d, the switching means being selectively set in conductive condition so that the amplification of an electrical signal applied at the input 14 is variable. In the embodiment described for aircraft control an input at terminal 22 representative of aircraft height is fed to a comparator 21 where it is compared with the summed voltage from a plurality of binary weighted resistors 19a, 19b, 19c, 19d connected in series to each of the stages of a binary counter 17. An output from the comparator 21 indicating that the state of the counter does not represent the input 22 controls a gate 23 to allow clock pulses to pass into the counter 17. When the count in the counter represents the input 22 appropriate ones of the AND gates 13a to 13d are enabled so that an electrical signal at input 14 representing the angular deviation from the predetermined glide path is passed to selected ones of the binary weighted resistors 12a to 12d to give an output from the amplifier 11 representing the required pitch correction to be applied to the aircraft.
Patent GB-1315256-A (GB)
Title: Projection of images
IPC: G03F7/20
Filed: 1971-10-04
Abstract: 1315256 Image projection apparatus INTERNATIONAL BUSINESS MACHINES CORP 4 Oct 1971 [15 Oct 1970] 46012/71 Heading G2A In the projection of an image carried by a master plate 14 on to an emulsion coated receiving plate 15 (e.g. a semi-conductor wafer), the two plates are mounted an immovable distance apart on a table 2, which table is shiftable in rectangular cartesian co-ordinate directions with respect to an optical projection system comprising light source 3, condenser 4 and optical system 5. An aperture 10 of the projection system limits the area of the image projected  so that only a section (17) Fig. 2, (not shown) is initially projected onto the plate 15. Continuous or intermittent movement of the table 2 ensures that the whole of the image is projected section by section on to the plate 15. In another embodiment Fig. 3, (not shown) the master and receiving plates are held side by side, and the optical projection system includes reflecting prisms (40, 41) and a reversing prism (42). In a third embodiment Fig. 4, (not shown), the two plates are again vertically spaced apart, but with a smaller distance between them than in Fig.1, and a glassfibre light conductor (76) is used to illuminate the master plate (14).
Patent GB-1326407-A (GB)
Title: Propulsion units for ships
IPC: B63H11/08
Filed: 1970-09-29
Abstract: 1326407 Propelling ships Z MARINCEK 29 Sept 1970 [1 Oct 1969] 46280/70 Heading B7V A ship's propulsion unit comprises a propeller pump 2 having an intake duct 1 and an output duct 3 both of which are tapered inwardly towards the pump 2, the measured or calculated angle formed between opposed inwardly tapering walls of the duct not exceeding sixteen degrees. The unit may be mounted within a fairing 5 in the bottom of the ship, generally in a vertical plane (Fig. 3). A protective net 12 is provided at the mouth of the intake duct 1 and guide vanes 33 and the end of the output duct 3. The propeller shaft 21 is pivotable through an angle # as shown. The mouth of the intake duct 1 may be flush with the ship's bottom (Fig. 4, not shown). The unit may be placed at the bow (Fig. 5, not shown) or at the stern, Fig. 6 (not shown). Pairs of units may be positioned symmetrically with respect to the central, vertical, longitudinal plane of the ship at the bow or along the sides of the ship (Figs. 2, 7, 8, 9, not shown). The unit may be placed centrally at the bottom of the bow with a single intake duct and two output ducts leading to the sides of the ship (Fig. 10, not shown) or at the stern with two intake ducts leading from the sides and a central output duct (Fig. 11, not shown). Units may be placed amidships both below and at the sides (Fig. 12, not shown). The unit may have the intake duct, pump and output duct in a straight line and be mounted externally on the hull (Fig. 13, not shown).
Patent GB-1000058-A (GB)
Title: Improvements in or relating to semiconductor devices
IPC: H01L29/00
Filed: 1963-11-25
Abstract: 1,000,058. Semi-conductor devices. CLEVITE CORPORATION. Nov. 25, 1963 [Nov. 27, 1962], No. 46521/63. Heading H1K. A semi-conductor device comprises contiguous collector, base and emitter regions, with a resistive layer, substantially co-extensive with the emitter layer and between it and a conductive electrode layer. In one embodiment the n + emitter 24, Fig. 3, of a silicon transistor is provided with a resistive layer 27 between a metal plate 28 and the emitter region. Local concentrations of current density in the emitter region are minimized by the resultant voltage drop caused by the resistive layer. By having the resistive layer of varying thickness it is further possible to achieve a uniform electric field over the emitter-base junction. The layer 27 may be n - semi-conductor 35, Fig. 5, epitaxially grown on the emitter 34, and have a further n+ region 36 between it and a metal plate 37. In order to prevent the injection of thermally produced carriers from the emitter into the resistive layer, a layer of material with high recombination constant may be provided between the two, and may be, for example, a layer of high resistivity metal. Reference is also made to the application of the principle of the invention to a rectifier and Fig. 11 (not shown) shows a rectifier having a n+-i-p+ structure with a high resistivity region formed from two n + layers with an n - layer between them. This is in ohmic contact with a highresistivity metal layer, itself in ohmic contact with the n+ layer of the rectifier.